How would you respond if someone swear you

. . . if someone swears at you.

It depends on the context.
I might say 'Please don't use bad language'.

(What is an asdress?)

address

The word (cuss) is not often used?

It's a sub-standard, informal word ( a version of the word 'curse'.).
Don't use it in a job interview, or if you are talking to the Queen of England.

Clive

CliveIt's a sub-standard, informal word ( a version of the word 'curse'.).Don't use it in a job interview, or if you are talking to the Queen of England.Clive

It's part of American English.

I don't consider it sub-standard, but I do consider it very informal.

Another option: Please don't use language like that around me.